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First In-situ Evidence of Pancaked ICME and it's Distinct Plasma Characteristics Compare to Non-Pancaked ICME during Solar Cycles 23 and 24
- Indian Institute of Geomagnetism (IIG); Anil Raghav - University of Mumbai, India
The decade study suggests that magnetic topology of an ICME can be cylindrical, toroidal, elongated elliptical, etc. In addition to this, several remote observations and models/simulations suggest that ICME can show 'pancaked' structure as well. Here, for the first time, in-situ observation of pancaked ICME at 1 AU are investigated using PMS analysis technique. The additional statistical investigation was performed for 468 ICME from 1998 to 2017. We reveal that ~ 30% ICME shows planar whereas ~ 70% are non-planar signature. The average plasma parameters i.e., plasma temperature, density, speed, beta, thermal pressure, and magnetic pressure in the planar ICME is significantly higher compared to non-planar ICME. This indicates that planar MCs are highly compressed. The double-strength of the southward/northward magnetic field component associated with planar ICME clearly implies that it is more geo-effective than the non-planar ICME. We believe that the above study is very useful for ICME arrival time predication, solar-terrestrial physics, space weather physics, etc.
16 July 2020
Abstract submission opens:
16 July 2020
European Space Weather Medals:
6 September 2020
25 September 2020
Registration deadline: [extended]
10 October 2020
Abstract submission deadline:
4 September 2020